diff --git a/include/util/tarray2.h b/include/util/tarray2.h
index 7c253d36eb467f8bfb18c8203492b711686c5dc4..589dfb12ee3813ecd3d1d7d5b509c7a8a4b3a313 100644
--- a/include/util/tarray2.h
+++ b/include/util/tarray2.h
@@ -45,6 +45,8 @@ typedef void (*TArray2Cb)(void *);
 #define TARRAY2_SIZE(a)        ((a)->size)
 #define TARRAY2_ELEM(a, i)     ((a)->data[i])
 #define TARRAY2_ELEM_PTR(a, i) (&((a)->data[i]))
+#define TARRAY2_FIRST(a)       ((a)->data[0])
+#define TARRAY2_LAST(a)        ((a)->data[(a)->size - 1])
 
 static FORCE_INLINE int32_t tarray2_make_room(  //
     void   *arg,                                // array
diff --git a/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c b/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c
index 88474fdcac9d527eb6d892db75f937af69d76c93..37158acf78e639fe0aff3c997be4fea928262a94 100644
--- a/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c
+++ b/source/dnode/vnode/src/tsdb/dev/tsdbCommit.c
@@ -124,17 +124,12 @@ static int32_t open_committer_writer(SCommitter *pCommitter) {
     return open_writer_with_new_stt(pCommitter);
   }
 
-  SRBTreeNode *node = NULL;  // tRBTreeMax(&lvl0->sttTree);
-  if (node == NULL) {
+  ASSERT(TARRAY2_SIZE(&lvl0->farr) > 0);
+  STFileObj *fobj = TARRAY2_LAST(&lvl0->farr);
+  if (fobj->f.stt.nseg >= pCommitter->sttTrigger) {
     return open_writer_with_new_stt(pCommitter);
   } else {
-    // STFileObj *fobj = TCONTAINER_OF(node, STFileObj, rbtn);
-    // if (fobj->f.stt.nseg >= pCommitter->sttTrigger) {
-    //   return open_writer_with_new_stt(pCommitter);
-    // } else {
-    //   return open_writer_with_exist_stt(pCommitter, &fobj->f);
-    // }
-    return 0;
+    return open_writer_with_exist_stt(pCommitter, &fobj->f);
   }
 }